Baffle arrangement



Oct. 18, 1932. Q w, dN

' BAFFLE ARRANGEMENT Filed Dec. 6, 1930 M w 4 m a w 0 2 Y, Z v d H a INVENTOR. I Charles W, Gord n,

Patented Oct. 18, 1932 UNITED STATES CHARLES W. GORDON, OF HAMMOND, INDIANA, ASSIGNOR TO THE COMPANY, OF NEW YORK, 1V. Y.

PATENT oFF cs surannnn'rnn RAFFLE ARRANGEMENT Application filed December 6, 1930. Serial No. 500,522.

My invention relates to superheater boilers and aims to provide a design giving high steam temperature for a given amount of superheater surface.

It has been proposed to install a superheater in the space between the first and second banks of generating tubes of a Sterling type boiler. In such installations, a battle has been used running upwardly from the mud drum near the front edge ofthe second bank of tubes and a little at the rear of the space for the superheater to define the rear edge of an up-pass receiving the gases from the furnace. The degree of superheat obtained in said installations has, however, not been as high as expected in proportion to the amount of surface used.

This difficulty is overcome, in accordance with my invention, by placing a bafiie in front of the connection between the first and sec- 0nd passes of the boiler.

The novel features of my invention are pointed out in the appended claims. In order, however, that the invention may be fully and clearly understood, I will now describe in detail, in connection with the accompanying drawing, a boiler installation serving as an illustrative embodiment of my.

invention. In said drawing,

The figure is a vertical sectional view taken transverseto the axes of the drums of a Sterling type superheater boiler equipped in accordance with my invention. I

In the boiler installation illustrated, there is a mud drum 10 and three upper steam and water drums 12, 14 and 16 connected to the drum 10 by banks of generating water tubes inclined somewhat to the vertical. front bank of generating tubes is shown at 18, the second, third, fourth and fifth banks being indicated in outline at 20, 22, 24, and 26 respectively. Between front bank 18 and second bank 20 is a space 28 for a superheater 30. Along the front edge of the space occupied by bank 20 is a baffle 32 running upwardly from the mud drum 10 for defining the rear boundary of the first pass 34 of the boiler and the front boundary of the second pass 36 of the boiler. Super-heater 30 runs upward above the upper end of bafiie 32 to The a level nearthe'mud-drum 10. It is clear from the drawing that the first pass of the boiler is an up-pass and the second a down- 7 pass. The baflie 32 is accordingly terminated a sufficient distance below the drum 14 to provide a sufficiently large connection 38 between the up-pass Maud the down-pass 36. In accordance with my invention, a bafie 4O is placed in front of superheater 30 and of the connection 38 and extends from a level above the upper end of superheater 30 to a level near that of the upper edge of baffle 32. As shown, the bafiie 40 is relatively small in a vertical direction, its vertical extent, however, being varied in different installations,

depending upon its distance from the dividing line or connection between the first and second passes. If deslred, baffle 40 may be run upward to the drum 12, so that none of the gases will pass above it. However, the a flow above the upper edge of baffle 40 is not large inthe arrangement shown. As shown,

the bafiie 40 is supported in part on the front of the superheater, but I do not limit myself to this. Neither do I limit myself to any. particular type of superheater. Preferably,

however, the lower edge of battle 40 is at a level not far from that of the upper edge of It is assumedthat the gases in the front pass of a boiler not equipped in accordance with my inventiontend to rise along the front wall of the pass to so great an extent that not enough of the gases come into con tact with the surface of the superheater elements to produce the maximum results and that a bafilesuch as lOprevents, in large measure at least, the gases from bypassing the superheater elements. Whether or not this is the correct explanation, in a given installation having much the proportions of that illustrated in the drawing, the final temperature of the steam delivered from the superheater will be about40 F. higher when a baffle such as 40 is used than when such bafiie is omitted, whereas the operation of the steam generator as a whole is not adversely affected.

I claim:

1. A boiler having generating water tubes inclined to the vertical and means forming connected first and second passes in which the gases flow respectively up and down, certain of said tubes forming a front bank in said first pass, a superheater immediately back of said bank and also in said first pass, and a battle entirely and immediately in front of the upper portion of the said superheater and opposite the connection between said passes and having its lower edge not substantially below the lowest point in said connection.

2. The combination with a boiler having generating water tubes inclined to the vertical and a mud drum, of a baffle extending upwardly from said mud drum and defining the rear edge of a first up-pass in said boiler, certain of said tubes forming a tube bank in front of said bafiie, a superheater in said tube bank and extending upwardly to a level above that of the upper edge of said bafile, and a second bafl'le entirely and immediately in front of the upper portion of said superheater and having its lower edge at a level near that of the upper edge of said first baffle.

CHAR-LES W. GORDON. 

